The Joseon version of a Chaser about a medical practitioner who
struggles to save his daughter from a terminal illness while being
caught up in a plot to poison King Injong.

Royal Physician Choi Won (Lee Dong Wook), who works for the royal
family, becomes involved with the plot to poision King Injong and is now
a fugitive. He tries to save his daughter Choi Rang (Kim Yoo Bin), who
has an incurable disease. Choi Won has raised his daughter alone since
his wife passed away. Hong Da In (Song Ji Hyo) is the nurse who’s in
love with him.

Meanwhile, Lee Jung Hwan (Song Jong Ho ) is the Euigeumbu detective
who’s the one to capture him and he get help from bandit’s daughter, So
Baek (Yoon Jin Yi) while he is a fugitive. Crown Prince Lee Ho (Im Seul
Ong) is the suspicious crown prince who ends up thinking he was betrayed
by the one person he trusted in the world.